On February 05, 1969, Companies A and B were conducting a RIF operation 2 kilometers northeast of Trung Lap in the area of XT 6023. At 1637 hours, Company B requested a Dust-off for two wounded Bobcats. A grenade rigged with a trip wire was detonated at XT 600228, causing the injuries. One of the injured Bobcats died later in the day in hospital from his wounds.